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preintcopy.f.html |
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Source file: preintcopy.f
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Directory: /home/rjl/git/rjleveque/clawpack-4.x/amrclaw/2d/lib
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Converted: Sun May 15 2011 at 19:16:15
using clawcode2html
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This documentation file will
not reflect any later changes in the source file.
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c
c --------------------------------------------------------------
c
subroutine preintcopy(val,mitot,mjtot,nvar,ilo,ihi,jlo,jhi,
1 level,locflip)
c
implicit double precision (a-h,o-z)
include "call.i"
dimension val(mitot,mjtot,nvar)
dimension ist(3), iend(3), jst(3), jend(3), ishift(3), jshift(3)
iadd(i,j,ivar) = locflip + i - 1 + nr*((ivar-1)*nc+j-1)
c
c :::::::::::::: PREINTCOPY :::::::::::::::::::::::::::::::::::::::::::
c For periodic boundary conditions more work needed to initialize a
c new grid that sticks out. This routine was
c called because the patch sticks out of the domain,
c and has periodic bc.s preprocess the patch before calling
c intcopy to shift the patch periodically back into the domain.
c
c Inputs to this routine:
c ilo,ihi,jlo,jhi = the location in index space of this patch.
c
c Outputs from this routine:
c The values of the grid are inserted
c directly into the enlarged val array for this piece.
c
c :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
c
c # will divide patch into 9 possibilities (some empty):
c x sticks out left, x interior, x sticks out right
c same for y. for example, the max. would be
c i from (ilo,-1), (0,iregsz(level)-1), (iregsz(level),ihi)
ist(1) = ilo
ist(2) = 0
ist(3) = iregsz(level)
iend(1) = -1
iend(2) = iregsz(level)-1
iend(3) = ihi
jst(1) = jlo
jst(2) = 0
jst(3) = jregsz(level)
jend(1) = -1
jend(2) = jregsz(level)-1
jend(3) = jhi
ishift(1) = iregsz(level)
ishift(2) = 0
ishift(3) = -iregsz(level)
jshift(1) = jregsz(level)
jshift(2) = 0
jshift(3) = -jregsz(level)
do 20 i = 1, 3
i1 = max(ilo, ist(i))
i2 = min(ihi, iend(i))
do 10 j = 1, 3
j1 = max(jlo, jst(j))
j2 = min(jhi, jend(j))
if ((i1 .le. i2) .and. (j1 .le. j2)) then ! part of patch in this region
c
c check if special mapping needed for spherical bc.
c(j=2 is interior,nothing special needed)
if (.not. spheredom .or. j .eq. 2) then
iputst = (i1 - ilo) + 1
jputst = (j1 - jlo) + 1
call intcopy(val,mitot,mjtot,nvar,
2 i1+ishift(i),i2+ishift(i),
3 j1+jshift(j),j2+jshift(j),level,
4 iputst,jputst)
else
nr = i2 - i1 + 1
nc = j2 - j1 + 1
ng = 0 ! no ghost cells in this little patch. fill everything.
jbump = 0
if (j1 < 0) jbump = abs(j1) ! bump up so new bottom is 0
if (j2 >= jregsz(level)) jbump = -(j2+1-jregsz(level)) ! bump down
c next 2 lines would take care of periodicity in x
iwrap1 = i1 + ishift(i)
iwrap2 = i2 + ishift(i)
c next 2 lines take care of mapped sphere bcs
iwrap1 = iregsz(level) - iwrap1 -1
iwrap2 = iregsz(level) - iwrap2 -1
c swap so that smaller one is left index, etc since mapping reflects
tmp = iwrap1
iwrap1 = iwrap2
iwrap2 = tmp
jwrap1 = j1 + jbump
xlwrap = xlower + iwrap1*hxposs(level)
ybwrap = ylower + jwrap1*hyposs(level)
jwrap2 = j2 + jbump
c ## with dynamic memory alloc had to get scratch space above
c ## in case alloc moved
c locflip = igetsp(nr*nc*nvar)
c write(dbugunit,101) i1,i2,j1,j2
c write(dbugunit6,102) iwrap1,iwrap2,j1+jbump,j2+jbump
101 format(" actual patch from i:",2i5," j :",2i5)
102 format(" intcopy called w i:",2i5," j :",2i5)
call intcopy(alloc(locflip),nr,nc,nvar,
1 iwrap1,iwrap2,jwrap1,jwrap2,level,1,1)
c copy back using weird mapping for spherical folding
nrowst = 1 ! start filling up val at (1,1) - no additional offset
ncolst = 1
do 15 ii = i1, i2
do 15 jj = j1, j2
c write(dbugunit6,100)nrowst+ii-ilo,ncolst+jj-jlo,nr-(ii-i1),
c 1 nc-jj+j1
100 format(" filling loc ",2i5," with ",2i5)
do 15 ivar = 1, nvar
val(nrowst+(ii-ilo),ncolst+(jj-jlo),ivar) =
1 alloc(iadd(nr-(ii-i1),nc-(jj-j1),ivar))
15 continue
c call reclam(locflip, (nr*nc*nvar))
endif
endif
10 continue
20 continue
return
end